The practical shape of a Phoenix summer with this breed is an early outing before the sun has any authority, a late one after dark, and nothing in between. Pavement is the specific hazard: asphalt and concrete hold heat long after the air temperature has started to fall, and paw pads are burned in the evening far more often than people expect. The back of a hand on the surface for several seconds is the standard test and it is a good one.
What makes this workable rather than miserable is the breed itself. Energy is documented at 2 out of 5 and exercise requirement matches, so meeting the dog's needs inside two short bracketed windows is entirely realistic. A working breed in the same climate would be a genuine behavioural problem for four months a year; this one is not.
Indoors, cooling is equipment rather than comfort. Reliable air conditioning, a raised bed off a warm floor, and water available in more than one room cover almost all of it, and none of those are expensive relative to the dog.